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Analog Devices Inc./Maxim Integrated MAX4372HESA+T
- Part No.:
- MAX4372HESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4372HESA+T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,535
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Product details
Overview
MAX4372HESA+T from Maxim Integrated is a precision high-side current-sense amplifier with 100V/V fixed gain, operating from 2.7V to 28V supply and consuming only 30μA. It delivers 0.18% full-scale accuracy, 0.3mV input offset voltage, and supports 0–28V input common-mode range independent of supply voltage-ideal for battery current monitoring in notebook computers and smart-battery chargers.
For engineers reviewing the MAX4372HESA+T datasheet, MAX4372HESA+T pinout, MAX4372HESA+T application, or MAX4372HESA+T equivalent, this device offers verified high-side sensing capability, low-power operation, and voltage-output architecture eliminating external gain-setting resistors-critical for space-constrained, battery-powered system designs.
Technical Context
The MAX4372HESA+T implements a high-impedance current-mirror-based architecture that converts differential sense voltage (VRS+ − VRS−) into a proportional voltage output without requiring external feedback components. Its input common-mode range extends from 0V to 28V regardless of VCC, enabling accurate current measurement during deep battery discharge.
It features internal gain-setting (100V/V), rail-to-rail output swing limited to VCC − 0.25V, and 1.5Ω output impedance-ensuring stable driving of ADC inputs or downstream signal chains. The device achieves 110kHz −3dB bandwidth at full gain and settles to 1% in 20µs, supporting dynamic load monitoring in portable power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - fixed internal gain enables direct voltage output scaling: 100mV sense voltage yields 10V output. |
| Supply Voltage Range | 2.7V to 28V - supports wide-input battery and DC bus monitoring without external regulators. |
| Input Common-Mode Range | 0V to 28V, supply-independent - maintains functionality even when battery voltage drops below VCC. |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures precise current measurement over temperature and supply variation. |
| Input Offset Voltage | ±0.8mV max at +25°C - minimizes error in low-current sensing (e.g., standby leakage detection). |
| Supply Current | 30μA typical - enables always-on current monitoring in ultra-low-power battery applications. |
| Output Impedance | 1.5Ω - drives 1MΩ ADC inputs with negligible loading; supports RC filtering without gain error. |
Pinout & Package
MAX4372HESA+T is housed in an 8-pin SO (Small Outline) package with exposed pad (package code S8+2), RoHS-compliant and lead-free. Pin functions are electrically validated per Maxim's official pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor low-side terminal | Connects to load side of sense resistor; referenced to GND for differential voltage generation. |
| 2 (N.C.) | No connection | Not internally bonded; must remain unconnected on PCB to avoid parasitic coupling. |
| 3 (RS+) | Current-sense resistor high-side terminal | Connects to battery/DC source side; accepts up to 28V common-mode voltage. |
| 4 (N.C.) | No connection | Not internally bonded; leave floating per datasheet guidance. |
| 5 (GND) | Analog ground reference | Primary return path for internal circuitry; must tie to clean system analog ground plane. |
| 6 (N.C.) | No connection | Not internally bonded; no PCB trace or via required. |
| 7 (OUT) | Voltage output | Delivers amplified sense voltage (VOUT = 100 × VSENSE); drives ADC or comparator directly. |
| 8 (VCC) | Positive supply input | Accepts 2.7V–28V; requires ≥0.1μF ceramic decoupling capacitor placed near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates external gain resistors and layout sensitivity-reduces BOM count and improves production yield. |
| 0.18% full-scale accuracy | Enables ±0.2% current measurement error budget in battery fuel-gauge and charger control loops. |
| 0–28V supply-independent common-mode range | Supports monitoring of 2-cell Li-ion packs down to 0V while powered from 3.3V or 5V rails. |
| 30μA quiescent current | Permits continuous current logging in sleep modes of portable devices without compromising battery life. |
| 1.5Ω output impedance | Allows direct interface to 12-bit+ SAR ADCs without buffer op-amps-reducing board area and noise sources. |
Applications
| Smart-Battery Pack Monitoring | Notebook Computer Power Management |
|---|---|
|
Use Scenario: Real-time cell current tracking during charge/discharge cycles in multi-cell Li-ion battery packs with embedded fuel gauges. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to calibrated analog output for microcontroller ADC sampling. Use Value: Enables accurate Coulomb counting and state-of-charge estimation across full 0–28V battery voltage range, including deep discharge states. |
Use Scenario: System-level current monitoring of CPU VRM, display backlight, and USB-C PD ports in ultrabooks. IC Role / Device Role / Timing Role: Precision analog front-end for power rail telemetry, feeding data to EC or PMIC for thermal throttling and power budgeting. Use Value: Delivers sub-0.2% current measurement accuracy at 30μA supply, extending runtime while maintaining safety-critical overcurrent detection. |
| Portable Medical Device Battery Monitoring | Industrial Handheld Meter Load Profiling |
|
Use Scenario: Continuous battery discharge profiling in FDA-cleared portable ECG monitors and infusion pumps with strict power audit requirements. IC Role / Device Role / Timing Role: High-reliability current sensor interfacing to isolated sigma-delta ADC for regulatory-compliant energy logging. Use Value: Maintains 0.18% accuracy over −40°C to +85°C and 2.7–28V supply, meeting IEC 62304 Class C software safety constraints. |
Use Scenario: Field-deployable handheld multimeters measuring load current in 12V/24V industrial control panels and solar charge controllers. IC Role / Device Role / Timing Role: Standalone current transducer providing voltage output scaled for 16-bit internal ADC with minimal calibration drift. Use Value: Eliminates need for external gain stages and trimming resistors-reducing calibration labor and long-term drift in field instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080HASA+ | Higher bandwidth (2MHz), higher supply current (600μA), same 100V/V gain, SO-8 package. | Better suited for fast-switching SMPS current loop sensing; less suitable for micropower battery monitoring. | Select MAX4080HASA+ only if >100kHz bandwidth is required and 20× higher quiescent current is acceptable. |
| INA219BIDR | I²C digital output, integrated 12-bit ADC, 0.1% gain error, 26V max common-mode, SO-8 package. | Provides direct digital current/power reporting; lacks analog output flexibility and true 0V common-mode support. | Choose INA219BIDR when system MCU lacks ADC or requires calibrated digital telemetry; not for analog-loop or 0V-deep-discharge use. |
Compared with MAX4372HESA+T, MAX4080HASA+ trades 20× higher supply current for 18× bandwidth, while INA219BIDR replaces analog output with I²C digital reporting but sacrifices 0V common-mode operation and adds conversion latency-making MAX4372HESA+T optimal for ultra-low-power, zero-voltage-capable analog current sensing.
Availability
MAX4372HESA+T is available at Aetrix Electronics and suitable for notebook computer power management, smart-battery pack monitoring, and portable medical device battery telemetry requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX4372HESA+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for power, sensing, and connectivity applications in industrial, automotive, and consumer markets.
The MAX4372 family targets cost-sensitive, space-constrained high-side current sensing-delivering micropower operation, supply-independent common-mode range, and voltage-output simplicity for battery-powered systems.
FAQ
What is the maximum common-mode voltage supported by MAX4372HESA+T?
MAX4372HESA+T supports a 0V to 28V input common-mode range that is fully independent of its supply voltage (VCC). This means it remains functional even when VRS+ = 0V (e.g., deeply discharged battery) while VCC = 3.3V or 5V. The specification is guaranteed across −40°C to +85°C and verified per Absolute Maximum Ratings and Electrical Characteristics tables.
Does MAX4372HESA+T require external gain-setting resistors?
No, MAX4372HESA+T does not require external gain-setting resistors. It integrates a fixed 100V/V gain stage, delivering a voltage output directly proportional to the sense resistor voltage drop (VOUT = 100 × VSENSE). This eliminates resistor matching errors, layout sensitivity, and BOM overhead-confirmed in the General Description and Pin Configurations sections of the datasheet.
What is the supply current consumption of MAX4372HESA+T at 25°C?
MAX4372HESA+T consumes 30μA typical supply current at +25°C, with a maximum of 60μA across −40°C to +85°C. This value is measured under specified conditions (VRS+ > 2V, VSENSE = 5mV) and appears in the Electrical Characteristics table. Its micropower design enables always-on current monitoring in battery-critical applications.
Can MAX4372HESA+T be used with a 2-cell Li-ion battery in deep discharge?
Yes, MAX4372HESA+T is explicitly designed for this use case. Its 0–28V supply-independent common-mode range allows accurate current sensing even when the battery voltage falls to 0V-verified in the Detailed Description and Applications sections. This capability ensures reliable Coulomb counting and protection logic activation throughout full discharge cycles.
What package type is used for MAX4372HESA+T?
MAX4372HESA+T uses an 8-pin SO (Small Outline) package with RoHS-compliant lead-free finish (package code S8+2, outline 21-0041). It is not the SOT23 or UCSP variant-the "ESA" suffix denotes the SO package, confirmed in the Ordering Information and Package Information sections of the datasheet.
MAX4372HESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 110 kHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 30µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4372HESA+T FAQ
1.How can I place an order for MAX4372HESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HESA+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4372HESA+T reliable?
The price and inventory of MAX4372HESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HESA+T is usually 5 days.
3.What payment methods are accepted for MAX4372HESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HESA+T?
MAX4372HESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HESA+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4372HESA+T?
For technical support, including MAX4372HESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HESA+T requirements.
6.How does Aetrix verify that MAX4372HESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4372HESA+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4372HESA+T meets industry standards.
7.What is the process for return or replacement of MAX4372HESA+T?
All MAX4372HESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HESA+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4372HESA+T part is unused and in its original packaging.
Return procedure for MAX4372HESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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